St. John, U.S. Virgin Islands
acquired June 24, 2007 download large image (3 MB, JPEG, 2400x2400)
acquired June 24, 2007 download GeoTIFF file (9 MB, TIFF, 2400x2400)

Part of the U.S. Virgin Islands, the island of St. John incorporates both a land-based national park and a sea-based national monument. First established in 1956 and later expanded by the U.S. Congress, the Virgin Islands National Park covers more than 7,000 acres (2,800 hectares). Coral Reef National Monument—established ten years ago this week by presidential proclamation—encompasses submerged lands within 3 miles (5 kilometers) of the St. John coast.

The Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite captured this natural-color image of the eastern half of St. John on June 24, 2007. Settlements—marked by curving roads and light roofs—line the irregular coastline. The pinpoints of white in Coral Bay are probably boats.

The island’s interior is carpeted with varying shades of green. Temperatures vary little throughout the year, ranging between the low 80s to mid-90s Fahrenheit (mid-20s to mid-30s Celsius). Although the vegetation appears lush, much of it is second-generation growth, according to the U.S. National Park Service (NPS). During the colonial period, large swaths of the island were clear-cut to accommodate sugar cane production.

Along the fringes of the island, the complex seafloor of varying depths colors the water different shades of blue. The Coral Reef National Monument is comprised of interdependent and fragile ecosystems, including coral reefs, mangrove forests, and beds of seagrass. In addition to these ecosystems, the monument incorporates historical artifacts such as shipwrecks, which are rare in the Caribbean.

  1. References

  2. U.S. National Park Service. (2007, August). First Annual Centennial Strategy for Virgin Islands Coral Reef National Monument. (PDF file) Accessed January 18, 2011.
  3. U.S. National Park Service. (2009, October 27). Virgin Islands National Park. Accessed January 18, 2011.
  4. U.S. National Park Service. (2010, October 22). Coral Reef National Monument. Accessed January 18, 2011.
  5. Uhler, J.W. (2007). Virgin Islands National Park Information Page. Accessed January 18, 2011.

NASA Earth Observatory image created by Jesse Allen and Robert Simmon, using EO-1 ALI data provided courtesy of the NASA EO-1 team. Caption by Michon Scott.

EO-1 - ALI

St. John, U.S. Virgin Islands

January 20, 2011
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